This is the French bistro version of “From the New World” featuring five new characters: Cocoa Hoto, the main protagonist of the Is the Order a Rabbit? manga series as well as its anime series, Shoko Fuyuumi, Ito Suzuno, one of the main characters of Pretty Rhythm Rainbow Live, Yashichi, Mirumo’s muglox archival, and Rirumu, a female muglox assigned to Setsu Yuuki.
According to her bio on the Is the Order a Rabbit Wiki, Cocoa can sing and play the accordion very well. Except not both at once: if she tries to play and sing AT THE SAME TIME, the sound is rather unpleasant, but if she’s doing one OR the other, it’s good. As for Ito Suzuno and Yashichi, they play only one kind of instrument; that is, Ito’s Rainbow Live instrument is a musical keyboard, whereas Yashichi uses a triangle as his magic tool, as evidenced in their respective bios on the Pretty Rhythm/Pretty Rhythm Rainbow Live Wiki and the list of Mirmo! characters on Wikipedia. In Wii Music, however, Ito plays a variety of keyboard instruments, including the piano, galactic piano, toy piano, harpsichord and accordion, while Yashichi alternates between cowbell and güiro in his performances. So, with that being said:
Melody: accordion (Cocoa Hoto)
Harmony: clarinet (Shoko Fuyuumi)
Chord: harpsichord (Ito Suzuno)
Bass: upright bass (Sapphire “Midori” Kawashima)
Percussion: güiro (Yashichi), tambourine (Rirumu)